Point load testing of brittle materials to determine tensile strength and relative brittleness

Conference · Mon Jan 01 04:00:00 EST 1968 · Proc. Symp. Rock Mech.; (United States)

OSTI ID:6775990

Reichmuth, D R

Most brittle solids are relatively weak in tension and this weakness can be very significant in determining their performance in structures and excavations. There are now 3 distinct approaches being used to determine the tensile strength of brittle materials. These are shown schematically. The fist method consists of simply pulling the specimen apart by applying an axial load. Although this procedure is the easiest to understand, the technical problems encountered during testing are numerous. In the second method, tensile stresses are produced in the specimen by bending. Values obtained using this test are commonly called the modulus of rupture. The derivation of the equations used to calculate the maximum tensile stress resulting from this type of loading is based on the concepts used in elementary strength of materials. The last method involves inducing tensile stresses somewhere within a body using an external compressive load. Normally, a diametrical compressive load is applied to a disk-shaped specimen. (20 refs.)

• Research Organization: Montana State Univ.
• OSTI ID: 6775990
• Report Number(s): CONF-670470-
• Conference Information: Journal Name: Proc. Symp. Rock Mech.; (United States) Journal Volume: 9
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
BRITTLENESS
COMMINUTION
DEFORMATION
FAILURES
FRACTURING
MATERIALS TESTING
MATHEMATICS
MECHANICAL PROPERTIES
MECHANICS
RESERVOIR ROCK
ROCK MECHANICS
TENSILE PROPERTIES
TESTING
YIELDS